One of President Donald Trump's closest Republican allies in the Senate is concerned that lawmakers are not being told enough about what's happening with Iran.

Sen. Lindsey Graham, R-S.C., spoke with the media Wednesday and said more information needs to be released.

"No, I feel we haven't been well informed and I'm writing a letter with [Democratic] Sen. [Patrick] Leahy today to try to get a briefing," said Graham, according to The Hill.

"I don't think it's fair for us to walk around wondering."

The U.S. sent an aircraft carrier and several ships to the Middle East to counter what was reported to be a recent threat from Iran. The Trump administration has also stepped up its rhetoric against the Iranian regime. Earlier this week, four oil tankers in the United Arab Emirates and an oil pipeline were attacked, and reports say Iran was to blame.

Amid reports that the Department of Defense has a plan that would send up to 120,000 U.S. troops to the Middle East because of Iranian threats, Graham said he had no knowledge of the alleged plan.

"I just know what I read. The president has said it wasn't true," said Graham before adding that the U.S. is "clearly moving people" from the U.S. Embassy in Baghdad because of a threat from Iran.

"This is a big deal," he said. "We had people there during the height of the war. I was there a bunch of times getting rocketed. If we could stay in operation then, it must be some kind of real threat."

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